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Note 14 - Quarterly Financial Information (Unaudited) | 12 Months Ended
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Dec. 31, 2018
Notes to Financial Statements |
Quarterly Financial Information [Text Block] | 14. Quarterly Financial Information (Unaudited) As further discussed in Note 10, Commitments and Contingencies, our fourth quarter 2018 operating income, net earnings and earnings per share included the impact of pretax charges for contingent liabilities. As further discussed in Note 7, Income Taxes, our fourth quarter 2017, net earnings and earnings per share included the effect of a $309.2 million provisional amount recorded as a component of income tax expense from continuing operations resulting from the remeasurement of our deferred tax balance due to the enactment of the Tax Cuts and Jobs Act. Operating results by quarter for the years ended December 31, 2018 and 2017 are as follows (in thousands, except per share data):
|  | Quarter |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |
2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 1,948,245 |  |  | $ | 2,139,027 |  |  | $ | 2,209,760 |  |  | $ | 2,317,842 |
Operating income |  | $ | 168,781 |  |  | $ | 214,812 |  |  | $ | 174,688 |  |  | $ | 122,740 |
Net earnings |  | $ | 118,142 |  |  | $ | 151,652 |  |  | $ | 131,110 |  |  | $ | 88,681 |
Basic earnings per share |  | $ | 1.08 |  |  | $ | 1.39 |  |  | $ | 1.20 |  |  | $ | 0.81 |
Diluted earnings per share |  | $ | 1.07 |  |  | $ | 1.37 |  |  | $ | 1.19 |  |  | $ | 0.81 |
2017: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 1,629,158 |  |  | $ | 1,726,915 |  |  | $ | 1,843,334 |  |  | $ | 1,990,160 |
Operating income |  | $ | 149,389 |  |  | $ | 163,615 |  |  | $ | 164,972 |  |  | $ | 145,814 |
Net earnings |  | $ | 102,702 |  |  | $ | 97,869 |  |  | $ | 100,385 |  |  | $ | 385,308 |
Basic earnings per share |  | $ | 0.93 |  |  | $ | 0.89 |  |  | $ | 0.92 |  |  | $ | 3.51 |
Diluted earnings per share |  | $ | 0.92 |  |  | $ | 0.88 |  |  | $ | 0.91 |  |  | $ | 3.48 |

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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